Chapter 7.6, Problem 3P

Jayna and Lisa are comparing the prices of two boxes of cereal of equal weight. Brand A costs $3.29 per box, and brand B costs $2.87 per box. Jayna calculates that

   $\frac{\$3.29}{\$2.87}=1.15$

Lisa calculates that

   $\frac{\$2.87}{\$3.29}=0.87$

a. Use Jayna’s calculation to make two correct statements comparing the prices of brand A and brand B with percentages. Explain.

b. Use Lisa’s calculation to make two correct statements comparing the prices of brand A and brand B with percentages. Explain.